Improvement in machines for upsetting metallic bars



Z'Sheets--Sheel L T. HABDlM.

Machines for upsetting Metallic-Bars. No.l57,5l2.`

Patented Dec. 8,1874.

v NVE NT um dfww liga 2 Sheets--Sheet 2.

T. HARDlNG. Machines fur Yupsetting Metallic-Bars.V N0.l57,5l2.

Patented Dec. 8, 1874.

FIG-Vl FIGJV WVTNEESEE.

INVENT um /ax i UNITED STATES PATENT EEICE.

THOMAS HARDING, OF LA FAYETTE, INDIANA.

IMPROVEMENT IN MACHINES FOR UPSETTING METALLIC BARS.

Specification forming part of Letters Patent No. 157,5 12V, dated December 8, 1874; application led September 16, 1874.

To all whom it may concern:

Beit known that I, THOMAS HAR-DING, of La Fayette, in the county ot' Tippecanoe and State ot' Indiana, have invented a new 1and useful Improved Machine for Upsetting Metallic Bars; and I do hereby decla-re the following to be a full, clear, and exact description ot' the same, reference being had to the accompanying drawings, in which- Figure l is a perspective view of my machine. Fig. 2 is a plan of the same. Fig. 3 is a side elevation of the same. Fig. 4 is a horizontal section of the upsetting-dies enlarged. Fig. 5 is a transverse section of the same. Fig. 6 is a side view of a rod of iron with upset bosses. Fig. 7 is an elevation of a portion of a fence with pickets having solid bosses upset.

This invention consists in two sets of clamping-dies, one set of which have a longitudinal movement of approach and. recession in relation to the other set and operative mechanism to produce said movements, whereby a hot metallic rod may be clamped and upset or squeezed together endwise, so as to form enlargements or bosses corresponding in shape to the form of the dies employed.

That others may` fully understand my im provement, I will particularly describe it.

A is the main frame, composed of two longitudinal shears supported upon legs, a, ai, b b. These shears support at one end a bedpiece, B, and upon this is mounted the diet'rames O D, the former of which is fixed and the latter reciprocating on ways upon said bed-piece. E is a strong toggle connecting the reciprocating die-frame D with the tailpiece F at the opposite end of the shears A. Said toggle is operated by a lever, G, pivoted to the end legs b b and a connectingrod, H, from the short arm of said lever to the center joint of the toggle. The legs I) b are suitably braced to prevent them from spreading. Each of said die-frames carries clamping and shaping dies I J and I J The dies J J are fixed upon the bed, and the dies I I reciprocate in a direction transverse to the motion of the die-frame D. The latter dies are caused to recede by the springs t' i or their equivalents, so that the rod to be upset may be inserted from above or the end, as may be most convenient. The opposed faces of the said dies are. shaped to grasp the rod to be upset, Whether the same is round or prismatic, and the faces of the sets of dies which are opposed to each other are recessed, as at d d, in accordance with the desired shape of the upset boss to be formed. This may be spherical or of any other desired form. Behind each die I I is a wedge or cam-block, K, which, when forced down between the said die and an abutment, L, causes said die to move forward and clamp the rod interposed between it and its opposite die J firmly. y

To relieve friction to as great an extent as possiblea frictionroller constitutes the abutment L, and a corresponding roller, Z, is attached to the cam K.

The lower ends ot' the wedge-cams K are attached, by short connecting-rods m, to a crossebar, n, and this latter is attached by its middle to the treadle P by means of the connecting-rod O.

When a hot bar of metal is placed between the dies the dies I I are moved forward by the depression of the treadle l? and camblocks K K. The lever G is then depressed, and the toggle E is thereby straightened, and the two sets of dies are brought together, causing the metal to be upset or crowded together between the portions griped by the dies, and forcing it to fill the dies d d, and thus produce a solid enlargement or boss of any desired form for ornament or utility.`

' In Figs. 6 and 7 is represented an iron fence-picket,`with bosses e near its two ends, which, when in position, are located between the rails and in contact with them, so that said pickets are retained in place without being riveted, asshown. The ornamental bosses on carriages and other iron now com- Y monly produced by forging between dies may be produced by my machine.

Instead of the reciprocating cams K K, rotatin g cams may be employed to close the HAdies I J.

P, and the toggle E, operated by the ieve'i G, the Whole mounted upon a frame, A, and combined to form an upsettingmaehine, substantially as set forth. v

THOMAS HARDING.

Hui/ing described my invention, what Ielaim as new is 1. The clamping and upsetting dies I J und I J f, combined with the sliding; cams K K and operative treadle l), provided with suitable connecting-rods. v

2. The clamping and upsetting dies I J and I J", cam-blocks K K, opera-ted by treadle Witnesses:

HENRY THOMASON, PATRICK AHEREN. 

